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The tetrad is the four spores produced after meiosis of a yeast or other Ascomycota, Chlamydomonas or other alga, or a plant. After parent haploids mate, they produce diploids. Under appropriate environmental conditions, diploids sporulate and undergo meiosis. The meiotic products, spores, remain packaged in the parental cell body to produce ...
The tetractys. The tetractys (Greek: τετρακτύς), or tetrad, [1] or the tetractys of the decad [2] is a triangular figure consisting of ten points arranged in four rows: one, two, three, and four points in each row, which is the geometrical representation of the fourth triangular number.
Tetrad (astronomy), four total lunar eclipses within two years; Tetrad (chromosomal formation) Tetrad (general relativity), or frame field Tetrad formalism, an approach to general relativity; Tetrad (geometry puzzle), a set of four simply connected disjoint planar regions in the plane; Tetrad (meiosis), the four cells produced by meiotic cell ...
A tetrad is a set of four notes in music theory. When these four notes form a tertian chord they are more specifically called a seventh chord , after the diatonic interval from the root of the chord to its fourth note (in root position close voicing).
While a total lunar eclipse is a fun night sight for skywatchers, for others the oncoming blood moon and tetrad brings something else – tidings of doom. As CTV News points out, a number of ...
A medical tetrad is a group of four, while a pentad is a group of five. Triads. Name Triad Disease Abdominal aortic aneurysm rupture Triad:
A frame field in general relativity (also called a tetrad or vierbein) is a set of four pointwise-orthonormal vector fields, one timelike and three spacelike, defined on a Lorentzian manifold that is physically interpreted as a model of spacetime.
The blood moon prophecies were a series of prophecies by Christian preachers John Hagee and Mark Biltz, related to a series of four full moons in 2014 and 2015.The prophecies stated that a tetrad (a series of four consecutive lunar eclipses—all total and coinciding on Jewish holidays—with six full moons in between, and no intervening partial lunar eclipses) which began with the April 2014 ...